<?php

class LocationsController extends Controller {
    public $layout = 'contents';
    
    const PAGE_SIZE = 15;

    /**
     * @var CActiveRecord the currently loaded data model instance.
     */
    private $_model;

    /**
     * @return array action filters
     */
    public function filters() {
        return array(
            'accessControl', // perform access control for CRUD operations
        );
    }

    /**
     * Specifies the access control rules.
     * This method is used by the 'accessControl' filter.
     * @return array access control rules
     */
    public function accessRules() {
        return array(
            array('allow',  // allow all users to perform 'index' actions
                'actions'=>array('index', 'finder'),
                'users'=>array('*'),
            ),
            array('allow', // allow authenticated user to perform 'create' and 'update' actions
                'actions'=>array('create','update'),
                'users'=>array('@'),
            ),
            array('allow', // allow admin user to perform 'admin' and 'delete' actions
                'actions'=>array('admin', 'delete'),
                'users'=>array('admin'),
            ),
            array('deny',  // deny all users
                'users'=>array('*'),
            ),
        );
    }

    /**
     * Creates a new model.
     * If creation is successful, the browser will be redirected to the 'index' page.
     */
    public function actionCreate() {
        $model = new Location;
        $model->node_id = Yii::app()->request->getParam('node');
        if (isset($_POST['Location'])) {
            $model->attributes = $_POST['Location'];
            if ($model->save()) {
                $this->redirect(array('index'));
            }
        }
        $this->render('create', array('model' => $model));
    }

    /**
     * Updates a particular model.
     * If update is successful, the browser will be redirected to the 'show' page.
     */
    public function actionUpdate() {
        $model = $this->loadLocation();
        if (isset($_POST['Location'])) {
            $model->attributes = $_POST['Location'];
            if($model->save()) {
                $this->redirect(array('index'));
            }
        }
        $this->render('update',array('model' => $model));
    }

    /**
     * Deletes a particular model.
     * If deletion is successful, the browser will be redirected to the 'index' page.
     */
    public function actionDelete() {
        if (Yii::app()->request->isPostRequest) {
        // we only allow deletion via POST request
            $this->loadLocation()->delete();
            $this->redirect(array('index'));
        } else {
            throw new CHttpException(400,'Invalid request. Please do not repeat this request again.');
        }
    }

    /**
     * Find by aJax
     */
    public function actionFinder() {
        if (Yii::app()->request->isAjaxRequest) {
            $parent_id = Yii::app()->request->getParam('parent_id');
            $criteria = new CDbCriteria;
            $criteria->condition = "parent_id = {$parent_id}";
            $criteria->order = 'order_pos ASC';

            $pages = new CPagination(Location::model()->count($criteria));
            $pages->pageSize = self::PAGE_SIZE;
            $pages->applyLimit($criteria);

            $sort = new CSort('Location');
            $sort->applyOrder($criteria);

            $models = Location::model()->findAll($criteria);

            $this->renderPartial('finder', array(
                'models' => $models,
                'pages' => $pages,
                'sort' => $sort,
            ), false, true);
        }
     }

    /**
     * Lists all models.
     */
    public function actionIndex() {
        $this->processAdminCommand();

        $criteria = new CDbCriteria;
        $criteria->condition = 'parent_id != 0';
        $criteria->order = 'order_pos ASC';

        $pages = new CPagination(Location::model()->count($criteria));
        $pages->pageSize = self::PAGE_SIZE;
        $pages->applyLimit($criteria);

        $sort = new CSort('Location');
        $sort->applyOrder($criteria);

        $models = Location::model()->findAll($criteria);

        $this->render('index', array(
            'models' => $models,
            'pages' => $pages,
            'sort' => $sort,
        ));
    }


    /**
     * Returns the data model based on the primary key given in the GET variable.
     * If the data model is not found, an HTTP exception will be raised.
     * @param integer the primary key value. Defaults to null, meaning using the 'id' GET variable
     */
    public function loadLocation($id=null) {
        if($this->_model===null) {
            if($id!==null || isset($_GET['id']))
                $this->_model=Location::model()->findbyPk($id!==null ? $id : $_GET['id']);
            if($this->_model===null)
                throw new CHttpException(404,'The requested page does not exist.');
        }
        return $this->_model;
    }

    /**
     * Executes any command triggered on the admin page.
     */
    protected function processAdminCommand() {
        if(isset($_POST['command'], $_POST['id']) && $_POST['command']==='delete') {
            $this->loadLocation($_POST['id'])->delete();
            // reload the current page to avoid duplicated delete actions
            $this->refresh();
        }
    }
}
